The planned maintenance for this weekend will apply to Barclays and Barclaycard customers (Image: PA)

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Barclays customers are being warned they may have limited access to their money this weekend ahead of planned maintenance works.

The bank's online website, app and telephone service will be down between 23:30 on Saturday 9 June until 15:30 on Sunday 10 June to carry out improvement upgrades.

"We're sorry, you won't be able to manage your account online, by phone or in the app," a text message being sent out to customers read.

Customers won't be able to manage their money from a computer this weekend (Image: Getty)

During this period, all Barclays cards, the Barclaycard app and Pingit will be unavailable with "payments finished as soon as the work is complete".

Barclays customers will continue to be able to make debit card purchases, and well as withdraw funds from ATMs, however, during the outage, you won't be able to view transactions.

Barclaycard customers will also be able to make purchases and bill payments, however it won't be processed until after the event.

The bank said anyone that needs to transfer money during the outage should move it before 23:30 on Saturday night.

"The system upgrade forms part of our regulatory requirements which every bank has to follow," a Barclays spokesman sold Mirror Money.

"It will be undertaken during the early hours of Sunday morning which is at a time that causes the least number of customers to be impacted.

"We recognise that some customers will be impacted which is why we have issued the advance notifications and will advise customers as soon as our services become available".

How to prepare for an online backing outage

Here are some tips from uswitch.com on how to prepare for an online banking outage - and make sure you're not left out of pocket.

Take note of when the update will take place and plan ahead. Think about what standing orders and direct debits you have scheduled during that time. If you have payments that must be made during the update, reschedule them to be paid in advance.

You may not be able to access your account during an update, so check your account balance beforehand to keep track of the funds you have available.

Make sure you have enough money available for the duration of the outage, in case you’re unable to access your account during this time. You can take out cash in advance or use a prepaid card to make any necessary purchases.

Consider having a backup account with a different bank in case of emergencies. Having all your eggs in one basket will make it harder to access your money during an outage and makes your finances more vulnerable. If you have an account with a different bank, you can transfer some funds from your primary account while the update is taking place so you’re not left stranded.

Once the scheduled maintenance is complete it is important to update your banking app so you can benefit from the latest features included in the upgrade.